Acyclic machine.



No. 895,887. PATENTED AUG. 11, 1908.

- J. E. NOEGGERATH. I

AGYOLIG MACHINE. AP PLIOATIOH FILED JAN. 16,1906.

IIUWESSE-S WW m UNITED strArrEs PATENT. OFFICE.

JAKOB E. NOEGGERATH, OF SGHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC I COMPANY, A CORPORATION OF NEW YORK.

AGYCLIC MACHINE.

- Specification 0! Letters Patent.

Patented Aug. 11, 1908.

Application filed January 16, I906. Serial No. 296,411.

To all whom it may concern:

Be it known thatI JAKOB E. NOEGGERATH, a citizen ofthe United States, residing at Schenectady, in the county of Schenectady, State of New York, have invented certain new and useful Im rovements in Acyclic Machines, of which tiie following a'specification.

M invention relates to dynamo-electric mac ines of the acyclic type, and its ob'ect is to provide a novel construction for suc machines which is more efficient and simpler than the constructions heretofore employed.

Acyclic machines, as ordinarily constructed, comprise a stationary homopolar field structure provided with a magnetizing winding, and a revolving armature with or without armature conductors. The field winding is frequently and conveniently arranged in the form of a coil or coils carried by the field structure concentric with the armature.

My invention consists of an acyclic machine possessing certain novel features, which will be definitely pointed out in the appended claims.

My invention will best be understood by reference to the accompanying drawing, which shows a side elevation partly in crosssection of, an acyclic machine arranged in ac-. cordance with my invention.

In this drawing A represents the revolving armature carried on a suitable shaft S. The armature is substantially cylindrical in form with enlarged flanges at the end, and carries at its center between the endflanges the magnetizing winding M formed of coils wound around and supported on the periphery of the armature and insulated therefrom. The armature may be slotted as shown in the drawing to receive the terminal leads for these coils. These coils are held in place against centrifugal strain by a metallic shell D, which is either in whole or in part of nonmagneticniaterial so as to have a high reluctance, and is rovided with ventilating holes, as shown. represents the field magnet which is arranged to resent homopolar faces to both ends of t e armature." The field flux may be considered. as passing from one end-flange of the armature, across the airap, into the field structure F, across the fiel the other homo olar face across. the second air-gap and t rough the armature flange at that end. The field structure F is provided with the usual openings f, to give access to the brushes. The field flux is stationary in s ace, as in the usual construction. consequent y, as the armature rotates, cutting th1s flux, a difference of potential will be induced between the armature shaft and the armature periphery between the'end-flanges. Consequently, b means of collector rings C supported outsi e of theshellD and electrically-connected thereb with the eriphery of the armature and t e brushes l forming one terminal, and the brushes B bearing on the shaft and forming the other terminal, a current may be led off'from the machine.

The armature is shown arranged for lowvoltage, without separate conductors, the armature body itself forming the seat of the induced currents which are suppliedto loadcircuit. It will be seen that thecollector rings C serve not only as means for collectingcurrent, but also to strengthen the shell D.

Since the machine is shown as a low-voltage machine it is also shown as separately ex cited. The terminals of the field winding M are connected to collector rings 0 to which the exciting current is supplied by a small exciter E. 1

R represents the field rheostat.

What I claim as new and desire to secure by Letters Patent of the United States, is,

1. In a dynamo-electric machine, a revolving armature, a stationary homopolar field structure, having poles each extending uniformly around the armature, a ma netizing winding surrounding and carried y the armature, a non-magnetic shell surrounding said winding and restraining it against'centrifugal force, and collector rings carried by said shell.

2. In a dynamo-electric machine, a revolving cylindrical armature, a magnetizing winding surroun ing and carried by the central portion of the armature, a stationary field structure presenting to both ends of the armature homopolar faces each extending uniformly around the armature, a non-magnetic shell surrounding the magnetizin winding and restraining it against centrifuga fplrcfia, and collector rings carried by said s e 3.. In a dynamo-electric machine, a revolving cylindrical armature having enrestraining it against centrifugal said flanges, current collecting means engaging the'armature between said flanges, and current-collecting means engaging the armature outside of said flanges.

4. In a dynamo-electric machine, a revolving cylindrical armature having enlarged flanges at its ends, a magnetizing winding surroundin and carried b the armature between saig flanges, a shel of high reluctance surrounding said winding and force, a

field structure adapted to present homopolar faces to said flanges, current-collecting means engaging said armature between said flanges, an current-collecting means engaging the 15 armature outside of said flanges.

In witness whereo f l' have hereunto set my hand this'15th da of Januar 1906.

JAKOB .NOEGG RATH. Witnesses:

HELEN ORFORD, G. C. HonmsTER. 

